Summary

Edward H. Jacob A study of mushrooms and mushroom spawn (1914)

Growers who are obliged to purchase manure at a distance, pay the freight on it and employ competent men to handle and care for the mushroom-growing plants, estimate the cost of producing mushrooms at 15 to 25 cents per pound.
Those who grow mushrooms for pleasure, and have their own stables, or get manure from a neighboring stable, are at very little expense and could grow mushrooms at less than half the above cost.
Source: Gutenberg

Edward H. Jacob A study of mushrooms and mushroom spawn (1914)

If mushrooms are to be grown for the larger markets like New York, Philadelphia, Boston, Pittsburgh or other Eastern cities, the net prices realized by the Eastern grower will be much less. In fact, the markets occasionally are badly overstocked, and mushrooms sell below the actual cost of production. It would therefore seem to be most profitable when mushrooms can be delivered to the user by the grower.
Source: Gutenberg

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